Building-block.



No. 860,012. PATENTED JULY 16, 1907.

F. CHRISTIAN.

BUILDING BLOCK. APPLICATION 211.31) AUG. 29.1906.

,4 7. W2 2 M JC M2? 3 Wmu'x (for s'm'rns Y BUILDING-BLOCK.

To all whom it inay concern: I

Be it known that I, FREDERICK Cnms'rrsrr, a citizen oi the United States,- residing at Wichita, in the county of Sedgwick andState oiKaQnshs, have invented new and useful Improvements in Building-Blocks, of which the following is a specification. f .This. invention is a building block and wall con structed therefrom, the, block being especially intended for production in. concrete'although it may beinade;

of 7 other material,

The obj ectoitheinvention to produc'eiablock and wall of improved construction, characterized by a novel and improved 'lapjoint,'--and 'also adapted to forrnla hollow wall with laps between the face and back thereof; The block is also adapted for imitation Brick work. When the'blo cks are set up in a hollow wall, a continuous air space is produced therebetween, which.

is desirable for various well-known reasons. I Another feature of -the invention is an improved shape which'allows the concrete to be pressed or packed closer orbetterthan would otherwise be thecase'.

' The 'inVentiOn is illustrated in thefaccompanying drawingginwhich' 1 .Figur 1 is a perspective viewoion of in; tim '25 Fig. 21: a me View of apart, of a. wall constructed thereof. Fig. 3 is a top iew of the same, showin how the front and hacle blocks lap at the middle of the wall.

Referring. specifically to the drawings, the: blocks will .be seen'to be triangular in general outline, having a front portion d and rearwardly-extending portions 7,

between which there is a segmental co;'e opening 8 extending vertically through the block. The front of the block isiflat but may be scored as at 9 to imitate brick, and at its ends it is halyed, as at 10, so that when laid in awall'lapped joints are produced. Each bloclr,

when scored, represents twocoursesoi brick, andis 'preferably rnade so that the lower part of the block is three bricks in length and theiu iper 4 When the blocks are lai'id in awall they must be reversed alternately, so that the'nieeting ends will lap; 40 'asshown. V J I I- The'i'earwsrdly extending portions 7 are stepped on: the rear side, asshotvn'nt 11. This stepped surface a. decided improvement over a straight inclined surface; particularly in the production of =molded,"conc1'ete block's, because'such blocks me formed undergpres srnr(-i,= and I haveiound by practice that pressure is applied easiersnd better with the stepped construction than when a straight incline is formed at the rear siii'face." I r 1 When set in a wall, the blocks are laid to break joints --a5'ilsu al, and the" front and rear'parts o'f the'jwall are -1 gals/o set to breakjoints crosswise or horizontally, so it at the rearwardly extending portions "7 of one block "Project and lap over',the similarlyextending portions'of the Blocks in .the course below, so. that the facing arid 5E backing of the wall are bound together. The" space, between the facing andloacking is crossed by these extending portions, but is not closed, 'consequentlg there is a continuous or inter-communicating air spacethroughout all parts of the wall, as Well as in the liodyf 6 of theblocks.. r 7 I I claim: A hollow wall formed or outside and inside courses fol' n building blocks both ends. of which biocks are halved on :1 horizontal plane andl'onr the same side. forming long and short sections, the former of which lap and rest upon such other rind abut against the latter, said blocks lm ving' also" projections 'on their rear sides whlch lap each othel in the alternate inside and outside courses respectively,

In testimony whereof I have signed my name to .this specification in the presence of two subscrlblng' witnesses.

witnesses Romeo Coo M r-m,

CHARLES LIBBEY. l 

